65, 70 and 75
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All numbers that are multiples of all 2, 8 & 10 are multiples of their lowest common multiple which is 40.The multiples of 40 are 40, 80, 120, 160, ... of which only 80 is between 61 and 107.
72 and 90
It is: 80 and 100
There are three numbers between 61 and 107 that are multiples of 3, 6 and 7: 63, 84, 105.
LCM of 4,7,14 is 28 So question boils down to multiples of 28 between 61 and 107 Multiples of 28 are 28, 58, 84, 112, 140, ... So the answer is just 84.